Put-Call Ratio (Volume) (30-Day)

Put-Call Ratio (Volume): The ratio of puts traded to calls traded, for options with the relevant expiration date.

Prothena Corporation plc (PRTA) had 30-Day Put-Call Ratio (Volume) of 0.3842 for 2026-06-04.

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Figures for 2026-06-04

Volatility Metrics
Historical Volatility (Close-to-Close)	0.6127
Historical Volatility (Parkinson)	0.5954
Implied Volatility (Calls)	0.5356
Implied Volatility (Puts)	0.6153
Implied Volatility (Mean)	0.5754
Put-Call Implied Volatility Ratio	1.1488
Implied Volatility Skew	--
Option Statistics
Put-Call Ratio (Volume)	0.3842
Put-Call Ratio (Open Interest)	0.1351